首页> 外国专利> HIGH STRENGTH COLD-ROLLED STEEL SHEET HAVING EXCELLENT BALANCE BETWEEN ELONGATION AND STRETCH-FLANGEABILITY, AND METHOD FOR PRODUCING THE SAME

HIGH STRENGTH COLD-ROLLED STEEL SHEET HAVING EXCELLENT BALANCE BETWEEN ELONGATION AND STRETCH-FLANGEABILITY, AND METHOD FOR PRODUCING THE SAME

机译:具有高延伸率和拉伸可塑性的平衡的高强度冷轧钢板及其制造方法

摘要

PPROBLEM TO BE SOLVED: To provide a high strength cold-rolled steel sheet having an improved balance between elongation and stretch-flangeability, and better formability, and to provide a method for producing the same. PSOLUTION: The cold-rolled steel sheet has a composition containing, by mass, 0.05-0.30% C, ≤3.0% (including 0%) Si, 0.1-5.0% Mn, ≤0.1% (including 0%) P, ≤0.010% (including 0%) S, and 0.001-0.10% Al, and the balance mainly iron, and has a structure comprising 10-80% ferrite, 5% (including 0%) the sum of retained austenite and martensite, by an area rate, and the balance a hard second phase, wherein for a KAM value frequency distribution curve, the relationship between the proportion XSBKAM≤0.4°/SBof sites having a KAM value≤0.4° and the areal ferrite proportion VSBα/SBsatisfies XSBKAM≤0.4°/SB/VSBα/SB≥0.8 and the proportion XSBKAM=0.6-0.8°/SBof sites having a KAM value in the range of 0.6-0.8 is 10-20%. In the hard second phase adjoining the ferrite, three or less cementite particles having an equivalent-circle diameter of 0.1 μm or larger are dispersed per μmSP2/SPof the hard second phase. PCOPYRIGHT: (C)2011,JPO&INPIT
机译:

要解决的问题:提供一种高强度的冷轧钢板,其具有改善的伸长率和拉伸凸缘性之间的平衡以及更好的可成型性,并提供一种生产该钢板的方法。

解决方案:冷轧钢板的组成按质量计包含0.05-0.30%C,3.0%(含0%)Si,0.1-5.0%Mn,0.1%(含0%)Mn。 )P,&le; 0.010%(包括0%)S和0.001-0.10%Al,其余部分主要是铁,并具有包含10-80%铁素体的结构,<5%(包括0%)的保留总量奥氏体和马氏体,按面积率,并平衡硬第二相,其中,对于KAM值频率分布曲线,具有KAM值的部位的比例X KAM&le; 0.4& SB ; 0.4度区域铁素体比例V α满足X KAM&le; 0.4° / V α&ge; 0.8和比例X KAM值在0.6-0.8范围内的位点的KAM = 0.6-0.8°为10-20%。在与铁素体邻接的硬质第二相中,相对于硬质第二相的每μm 2 分散有3个以下的等效圆直径为0.1μm以上的渗碳体粒子。

版权:(C)2011,日本特许厅&INPIT

著录项

  • 公开/公告号JP2010255090A

    专利类型

  • 公开/公告日2010-11-11

    原文格式PDF

  • 申请/专利权人 KOBE STEEL LTD;

    申请/专利号JP20090231680

  • 申请日2009-10-05

  • 分类号C22C38/00;C22C38/06;C22C38/58;C21D9/46;

  • 国家 JP

  • 入库时间 2022-08-21 18:24:34

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